You don’t need all 50 to do it. Wyoming’s largest metro area isn’t that far from Colorado’s, and two of Missouri’s largest cities are on its East and West borders.

States stockpiling or relying on Federal stockpiles or making agreements to share stockpiles is as much a choice as any other. Seeing as how the Federal stockpile was not properly maintained and refilled by either the Obama administration or the Trump administration (who could have at least checked on it) after H1N1, maybe at least one of them would manage to do a competent job of it.